Effects of nanocrystal formation on the soft magnetic properties of Fe-based bulk metallic glasses

J. E. Gao; H. X. Li; Zengbao Jiao; Y. Wu; Y. H. Chen; T. Yu; Z. P. Lu

doi:10.1063/1.3621832

Effects of nanocrystal formation on the soft magnetic properties of Fe-based bulk metallic glasses

J. E. Gao, H. X. Li, Zengbao Jiao, Y. Wu, Y. H. Chen, T. Yu, Z. P. Lu

Research output: Journal article publication › Journal article › Academic research › peer-review

63 Citations (Scopus)

Abstract

We developed several Fe-based bulk metallic glasses with a unique combination of large glass-forming ability and excellent soft magnetic properties by minor doping of Cu in the Fe76C7.0Si3.3B5.0P8.7alloy. Proper additions of the non-magnetic copper element which has a positive heat of mixing with Fe, coupled with adequate annealing, can stimulate formation of ∼5 nm Fe ferromagnetic nanocrystals, which results in the increment in the saturation magnetization. Over-annealing which induced coarsening of the -Fe nanocrystals reduces the ferromagnetic exchange interaction between the nanosized -Fe crystals and increases the effective magneto-crystalline anisotropy, thereby deteriorating the soft magnetic properties.

Original language	English
Article number	052504
Journal	Applied Physics Letters
Volume	99
Issue number	5
DOIs	https://doi.org/10.1063/1.3621832
Publication status	Published - 1 Aug 2011
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AU - Gao, J. E.

AU - Li, H. X.

AU - Jiao, Zengbao

AU - Wu, Y.

AU - Chen, Y. H.

AU - Yu, T.

AU - Lu, Z. P.

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Y1 - 2011/8/1

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AB - We developed several Fe-based bulk metallic glasses with a unique combination of large glass-forming ability and excellent soft magnetic properties by minor doping of Cu in the Fe76C7.0Si3.3B5.0P8.7alloy. Proper additions of the non-magnetic copper element which has a positive heat of mixing with Fe, coupled with adequate annealing, can stimulate formation of ∼5 nm Fe ferromagnetic nanocrystals, which results in the increment in the saturation magnetization. Over-annealing which induced coarsening of the -Fe nanocrystals reduces the ferromagnetic exchange interaction between the nanosized -Fe crystals and increases the effective magneto-crystalline anisotropy, thereby deteriorating the soft magnetic properties.

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Effects of nanocrystal formation on the soft magnetic properties of Fe-based bulk metallic glasses

Abstract

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